Tony Blair is to be interviewed live this evening by Yahoo News global anchor Katie Couric.

The former Prime Minister will be quizzed at the Aspen Ideas Festival, Colorado, at 8:30pm (3:30pmET). The ex-Labour politician, who backed the invasion of Afghanistan and Iraq, is the official envoy of the Quartet on the Middle East, made up of the United Nations, the U.S., the European Union and Russia. Mr Blair resigned from Downing Street seven years ago.